Name | Oxygen |
Synonyms | AIR Oxygen Dioxygen hyperoxia CAL-MAT AIR liquidoxygen Liquid-oxygen- HYDROGEN AND OXYGEN AUTOMOTIVE STANDARD R99-5 AUTOMOTIVE STANDARD R99-6 OXYGEN, PRESSURE TIN WITH 1 L COMPRESSED AIR, BREATHING AIR Air, refrigerated liquid (cryogenic liquid). 1-(5-O-phosphono-beta-D-ribofuranosyl)-1H-imidazol-5-amine |
CAS | 7782-44-7 132259-10-0 |
EINECS | 231-956-9 |
InChI | InChI=1/C8H14N3O7P/c9-5-1-10-3-11(5)8-7(13)6(12)4(18-8)2-17-19(14,15)16/h1,3-4,6-8,12-13H,2,9H2,(H2,14,15,16)/t4-,6-,7-,8-/m1/s1 |
Molecular Formula | O2 |
Molar Mass | 32 |
Density | 1.429(0℃) |
Melting Point | −218°C(lit.) |
Boling Point | −183°C(lit.) |
Flash Point | 421.9°C |
Water Solubility | one vol gas dissolves in 32 volumes H2O (20°C), in 7 volumes alcohol (20°C); soluble other organic liq, usually higher solubility than in H2O [MER06] |
Solubility | At 20 °C and at a pressure of 101 kPa, 1 volume dissolves in about 32 volumes of water. |
Vapor Presure | >760 mmHg at 20 °C |
Vapor Density | 1.11 (vs air) |
Appearance | colorless gas |
Color | Colorless gas, liquid, or hexagonal crystals |
Odor | Odorless gas |
Merck | 13,7033 |
Storage Condition | -20°C |
Stability | Stable. Vigorously supports combustion. Incompatible with phosphorus, organic materials, many powdered metals. |
Refractive Index | 1.776 |
Physical and Chemical Properties | Characteristics of colorless, transparent, odorless, tasteless gas. relative density 1.429(0 ℃) solubility is not soluble in water, slightly soluble in alcohol. |
Use | For metal cutting and welding, steel, medical, defense, electronics, chemical, metallurgy and other sectors |
Risk Codes | R8 - Contact with combustible material may cause fire R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R34 - Causes burns R48/20/22 - R37 - Irritating to the respiratory system |
Safety Description | S17 - Keep away from combustible material. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 1072 2.2 |
WGK Germany | - |
RTECS | RS2060000 |
FLUKA BRAND F CODES | 4.5-31 |
Hazard Class | 2.2 |
Toxicity | OSHA recommends a minimum oxygen concentration of 19.5% for human occupancy. |
under normal temperature and pressure for colorless, odorless, tasteless gas. Oxygen is non-flammable, but it is combustion-supporting. d0 (gas) 1. d-183 (liquid) 1.14g/rnL; Melting point -218.4 °c; Boiling point -182. 96 C, a critical temperature of 118. 95 ℃; Critical pressure 50. 14ATM; Heat of vaporization 50. 9cal/g (-183 C) (J lcal = 4.2). When cooled to -182.9 °c under normal pressure, it is a sky blue transparent liquid.
with the oxygen produced by the air separation unit as the raw material, more than 99.5% of the oxygen is obtained after two-stage rectification, and then it enters the high purity oxygen tower. After two low-temperature rectification, 99. More than 995% of the high purity oxygen.
high purity oxygen gas is mainly used for thermal oxidation, diffusion, chemical vapor deposition and plasma etching of semiconductor devices, and can also be used for optical fiber, color picture tube manufacturing and standard gas, correction gas and zero point gas, etc. As a source of oxidation and a reactive agent that produces high-purity water. For the MOS field effect device, the oxide layer must be quite dense, and the dry oxidation is carried out by using high purity oxygen. The oxide layer has a compact structure, less positive charge and high pressure resistance, which can meet the production needs. Mixed with carbon tetrafluoride, can be used for plasma etching.
combustion-supporting compressed gas, non-toxic. However, exposure to high concentrations of oxygen has adverse effects on the lungs and central nervous system. All combustible substances, especially oils and greases, shall not be exposed to high concentrations of oxygen. All possible sources of ignition must be closed or withdrawn. In a cool place, it is strictly prohibited to approach with acid, alkali, grease, flammable and explosive articles, high temperature heat source and electric spark, and avoid impact.